android - Failed to read PNG signature: file does not start with PNG signature

Question

Gradle build failing with this error:

Error:C:UsersRoman.gradlecachesransforms-1files-1.1appcompat-v7-26.0.2.aarab547c3f1b8061ef9426f524a823a15
esdrawable-xhdpi-v4abc_btn_switch_to_on_mtrl_00001.9.png failed to read PNG signature: file does not start with PNG signature

Error:java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.internal.aapt.AaptException: AAPT2 compile failed:
Error:Execution failed for task ':app:mergeDebugResources'.
Error: java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.internal.aapt.AaptException: AAPT2 compile failed:
aapt2 compile --legacy -o C:devworkspaceandroid2MatrixCalculatorappuildintermediates
esmergeddebug C:UsersRoman.gradlecachesransforms-1files-1.1appcompat-v7-26.0.2.aarab547c3f1b8061ef9426f524a823a15
esdrawable-xhdpi-v4abc_btn_switch_to_on_mtrl_00001.9.png
Issues:
 - ERROR: C:UsersRoman.gradlecachesransforms-1files-1.1appcompat-v7-26.0.2.aarab547c3f1b8061ef9426f524a823a15
esdrawable-xhdpi-v4abc_btn_switch_to_on_mtrl_00001.9.png failed to read PNG signature: file does not start with PNG signature

Some basic things i've tried to solve this issue:

1. Invalidate caches/restart
2. Deleting gradle folder

Answer 1

Perhaps it's not actually a PNG, but a JPG renamed to PNG.
The problem could be because of the wrong extension of images.

In my case, the file was a JPEG image but it was saved as PNG not converted to. In this situation change extension to the real one and convert to PNG then retry.

For instance, you have ic_logo.png but it's actually a JPG image.
You should rename it back to ic_logo.jpg and use something like Photoshop to convert the image to PNG format.